<!--
<!DOCTYPE html>
<html>
<body>
<p>请输入两个数字</p>


<form action="/haha/" method="post">
    {% csrf_token %}
    {{ form }}

    a: <input type="text" name="a"> <br>
    b: <input type="text" name="b"> <br>

    <input type="submit" value="提交">
</form>


</body>
</html>
-->
<form method='post'>
{% csrf_token %}
{{ form }}
<input type="submit" value="提交">
</form>